Kohler — APM802 Connection Procedure (RS-485 or Ethernet)
Installation · APM802 Controller
From a Kohler service manual covering: 1300REZCK, APM802, Decision-Maker 550, M340, MCP 3000, MPAC 1000, MPAC 1500, PM340. Check it applies to your exact model before use.
Applies to: Kohler 1300REZCK
Before you start
- Hazardous voltage. Will cause severe injury or death. Disconnect all power sources before opening the enclosure.
Procedure
- Disable the generator set per safety precautions.
- Turn off and disconnect power to all devices in the system.
- Connect to RS-485 connections on TB10 or to the RJ45 port labeled Ethernet 3.
- Verify that the controller is OFF.
- Reconnect the engine starting battery, negative (--) lead last.
- Reconnect power to the battery charger, if equipped.
Tools required
- Belden #9841 or equivalent shielded twisted-pair cable Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Source: Kohler service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.